Artificial light exposure at night is associated with increased rates of obesity and cancer, according to data recently published in the European Journal of Cancer. According to Eleonora Poggiogalle, MD, and colleagues, previous ecologic and epidemiologic studies determined that the disruption of the natural circadian rhythm due to outdoor artificial light exposure at night can result in the suppression of melatonin secretion, causing health risks that include cancer and obesity. Dr. Poggiogalle and colleagues presented data that explored the effects of indoor artificial light exposure at night (ALAN). The study identified gut dysbiosis, inflammation, hypovitaminosis D, and imbalance in cytokine secretion and levels as links between ALAN exposure and increased risks of obesity and cancer. The researchers highlighted the need for future prevention strategies that include reducing ALAN exposure as a measure against these diseases.
